Which process leads to a net movement of uncharged molecules from a low concentration to a higher concentration?
a. active transport
b. osmosis
c. facilitated diffusion
d. exocytosis
Ans: a. active transport
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Which event could result in speciation?
a. A bird develops a mutation that affects the shape of its feathers. b. A mouse is infected by a virus that changes its feeding cycle. c. A fish produces eggs with DNA transcription errors. d. A horse stretches to reach apples growing from a tall tree.
A chi square test is done to determine _____
A. whether an organism with a dominant phenotype is homozygous or heterozygous B. whether an allele exhibits complete or incomplete dominance C. what the predicted outcome of a dihybrid cross will be D. how closely actual results of a cross match the expected results E. whether a trait is determined by one gene or many genes
In meiosis the separated sister chromatids move to opposite poles of the cell during
A. metaphase I. B. metaphase II. C. anaphase I. D. telophase I. E. anaphase II.
In mushrooms, karyogamy occurs within the basidium
____________________ Indicate whether the statement is true or false.